package com.itouch.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.itouch.bracelet.R;

public class XListViewHeader extends LinearLayout {
      private LinearLayout mContainer;
      private ImageView mArrowImageView;
      private ProgressBar mProgressBar;
      private TextView mHintTextView;
      private int mState = STATE_NORMAL;

      private Animation mRotateUpAnim;
      private Animation mRotateDownAnim;

      private final int ROTATE_ANIM_DURATION = 180;

      public final static int STATE_NORMAL = 0;
      public final static int STATE_READY = 1;
      public final static int STATE_REFRESHING = 2;

      public XListViewHeader(Context context) {
            super(context);
            initView(context);
      }

      /**
       * @param context
       * @param attrs
       */
      public XListViewHeader(Context context, AttributeSet attrs) {
            super(context, attrs);
            initView(context);
      }

      private void initView(Context context) {
            // 初始情况，设置下拉刷新view高度为0
            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
                    android.view.ViewGroup.LayoutParams.FILL_PARENT, 0);
            mContainer = (LinearLayout) LayoutInflater.from(context).inflate(
                    R.layout.xlistview_header, null);
            addView(mContainer, lp);
            setGravity(Gravity.BOTTOM);

            mArrowImageView = (ImageView) findViewById(R.id.xlistview_header_arrow);
            mHintTextView = (TextView) findViewById(R.id.xlistview_header_hint_textview);
            mProgressBar = (ProgressBar) findViewById(R.id.xlistview_header_progressbar);

            mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,
                    Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                    0.5f);
            mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
            mRotateUpAnim.setFillAfter(true);
            mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f,
                    Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                    0.5f);
            mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);
            mRotateDownAnim.setFillAfter(true);
      }

      public void setState(int state) {
            if (state == mState) return;

            if (state == STATE_REFRESHING) {     // 显示进度
                  mArrowImageView.clearAnimation();
                  mArrowImageView.setVisibility(View.INVISIBLE);
                  mProgressBar.setVisibility(View.VISIBLE);
            } else {     // 显示箭头图片
                  mArrowImageView.setVisibility(View.VISIBLE);
                  mProgressBar.setVisibility(View.INVISIBLE);
            }

            switch (state) {
                  case STATE_NORMAL:
                        if (mState == STATE_READY) {
                              mArrowImageView.startAnimation(mRotateDownAnim);
                        }
                        if (mState == STATE_REFRESHING) {
                              mArrowImageView.clearAnimation();
                        }
                        mHintTextView.setText(R.string.xlistview_header_hint_normal);
                        break;
                  case STATE_READY:
                        if (mState != STATE_READY) {
                              mArrowImageView.clearAnimation();
                              mArrowImageView.startAnimation(mRotateUpAnim);
                              mHintTextView.setText(R.string.xlistview_header_hint_ready);
                        }
                        break;
                  case STATE_REFRESHING:
                        mHintTextView.setText(R.string.xlistview_header_hint_loading);
                        break;
                  default:
            }

            mState = state;
      }

      public void setVisiableHeight(int height) {
            if (height < 0)
                  height = 0;
            LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContainer
                    .getLayoutParams();
            lp.height = height;
            mContainer.setLayoutParams(lp);
      }

      public int getVisiableHeight() {
            return mContainer.getHeight();
      }

}
